package Polymorphism;

public class Keyboard implements USB {
    @Override
    public void open() {
        System.out.println("键盘,启动!");
    }

    @Override
    public void close() {
        System.out.println("键盘, 关闭!");
    }
    public void type(){
        System.out.println("键盘, 打字!");
    }
}
